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Vascular tumors of soft tissue


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Vascular tumors of soft tissue

  2. 2. Congenital hemangiomas RICH NICH Capillary hemangioma Variants: Juvenile hemangioma Cherry angioma Tufted angioma Lobular capillary hemangioma(pyogenic granuloma) Cavernous hemangioma Verrucous hemangioma Microvenular hemangioma Hobnail hemangioma Epithelioid hemangioma Acquired elastotic hemangioma Arteriovenous hemangioma Angiomatosis Spindle cell hemangioma
  3. 3. Tumor-like Conditions Papillary endothelial hyperplasia (Masson's tumor) Reactive angioendotheliomatosis Glomeruloid hemangioma Bacillary angiomatosis
  4. 4. Locally Aggressive Kaposi-like hemangioendothelioma Giant cell angioblastoma Rarely Metastasizing Kaposi's sarcoma Retiform hemangioendothelioma Papillary intravascular angioendothelioma Composite hemangioendothelioma
  5. 5. Epithelioid hemangioendothelioma Angiosarcoma Idiopathic (head and neck) Associated with chronic lymphedema (Stewart-Treves) Postirradiation Epithelioid
  6. 6. Fully formed at birth, non progressive Types: Rapidly Involuting Congenital Hemangioma (RICH) Non-Involuting Congenital Hemangioma (NICH) GLUT-1 negative Sites - extremities or post auricular skin, can occur elsewhere
  7. 7. TYPES Juvenile capillary hemangioma Most common type Complete involution by age 6-7 yrs C/F : purple to reddish macule or nodule centered in skin or subcutaneous tissue M/E : Lobules of capillary sized vessels supplied by feeder vessel Vascular space formations varies
  8. 8. Glucose transporter-1 (GLUT-1) - immunohistochemical marker CD31 & CD34- endothelial markers & CD 133, expressed in primitive cell - endothelial progenitor cells are involved in pathogenesis. Myeloid markers- CD14, CD15, CD32 and CD83.
  9. 9. Infantile hemangioendothelioma showing vaguely lobulated architecture
  10. 10. High cellularity and high mitotic activity of juvenile hemangioendothelioma should not lead to overdiagnosis of malignancy
  11. 11. Perineural spread of juvenile hemangioendothelioma
  12. 12. Variants : a) Lobular capillary hemangioma (Pyogenic granuloma) Common proliferative lesion, related to trauma Site- superficial dermis like lips, gums, hands, fingers, face of pregnant women (epulis) M/ELow power - organised pattern seen. lateral edges show lobular arrangement – group of capillaries proliferate High power –Small capillary epithelium lined spaces seen, also surrounded by perithelial or pericytic layer of cells
  13. 13. b) Tufted angioma: Acquired in childhood (1-5 yrs), congenital forms exist May persist unchanged or regress completely in few years resembles cellular JCH but discontinuous capillary lobules.
  14. 14. C) Cherry angioma : suspected involuted LCH Bright red, soft, raised, dome-shaped lesion of varying in size often present in large numbers. M/ENumerous capillaries with narrow lumina Prominent endothelial cells, arranged in lobular fashion in subpapillary region Intercapillary stroma edema and collagen
  15. 15. Age and site same as JH but less frequent No tendency to regress Locally destructive due to pressure symptoms M/E: Pattern of grouped dilated thin walled blood vessels with inconspicuous endothelial lining Associated Syndromes : Blue-rubber-bleb nevus syndrome – cavernous hemangioma of skin and GIT Maffuci syndrome – Cavernous hamangiomas and enchondromas
  16. 16. Cavernous hemangioma of soft tissue of orbit
  17. 17. Sinusoidal hemangioma : the vascular spaces are widely dilated
  18. 18. Wart like, dark blue papules or nodules Predilection for distal lower limbs Histology - mixture of cavernous and capillary vessel immediately below hyperkeratotic and acantholytic epidermis
  19. 19. Small, reddish lesion in young to middle-aged individuals Favored sites- arms, trunk, legs Thin, branching capillaries and small venules widely throughout the dermis Infiltration of arrector pili muscles by proliferating vascular channels
  20. 20. Usually over trunk or extremities of young or middle-aged adults Male predominance Small solitary brown to violaceous papule surrounded by a thin, pale area and a peripheral ecchymotic ring
  21. 21. Superficial reticular dermis- thin walled, dilated, and irregular vascular spaces Lined by endothelial cells with scanty cytoplasm and rounded nuclei that protrude into the lumina, resembling hobnails Extensive red blood cell extravasation, inflammatory aggregates, extensive stromal hemosiderin deposition seen
  22. 22. Develops in sun-exposed skin of forearms & neck Middle-aged to elderly patients Small, red or blue, circumscribed & asymptomatic plaque Superficial, proliferation of capillaries in background of solar elastosis Capillary surrounded by a layer of pericytes
  23. 23. Solitary dark red papule or nodule on face, lips, extremities of adults Densely aggregated, thick & thin-walled vessels lined by a single layer of endothelial cells in dermis Walls of vessels consist of fibrous tissue Most of the blood vessels are veins
  24. 24. Young adults Skin and subcutis Distal extremities – hand M/E : thin walled cavernous vessels lined by bland flattened endothelium admixed with solid areas composed of plump endothelial cells Recurrence is common (> 50%) with discontinuous growth pattern
  25. 25. Spindle cell hemangioma : Cavernous hemangioma like area
  26. 26. Kaposi sarcoma like area in the same
  27. 27. Chracteristic spongy low power appearance
  28. 28. Lower extremity – thigh M/E : Poorly circumscribed, diffusely infiltrating mass in the muscle composed of thick walled veins to cavernous vascular spaces Mitotic activity and intraluminal capillary tufting is seen Freely anastomosing vascular channels are absent
  29. 29. Skeletal hemangioma
  30. 30. Seen in women, 20-40 years Small dull erythematous plaque in head and neck M/E : -Well circumscribed nodule in the dermis or subcutis less in deep tissue - Vague lobular pattern of clustered small capillary sized vessels around a feeder vessel - Endothelial cells are plump with abundant cytoplasm with impingement on lumen of vascular channel “tomb stone appearance”
  31. 31. Epithelioid hemangioendothelioma – The tumor partially fills the lumen of femoral
  32. 32. Prominent cytoplasmic vacuolation is seen on high power examination
  33. 33. INTRAVASCULAR PAPILLARY ENDOTHELIAL HYPERPLASIA o It represents an exuberant organisation and recanalisation of thrombus o Can occur in de novo (pure) form in extremities and head and neck region or on a pre-existing vascular disorder (mixed) form in the trunk region o M/E- Exclusive intravascular nature with characteristic fibrinous or hyaline appearance of the papillary stalks Residual organising thrombi are often seen.
  34. 34. Intravascular papillary endothelial hyperplasia.
  35. 35. Poorly circumscribed diffuse network of vascular structures within a soft tissue Seen in childhood or adolescence presents as deep soft tissue swelling Two patterns : Mixed vessel type lesion resembling intramuscular angioma Capillary predominant type lesion with lobular pattern
  36. 36. An uncommon deep soft tissue tumor Seen in children and teenagers Associated with Kasabach Meritt syndrome especially if retroperitoneal mass > 20 cm M/E : - Lobular architecture, Highly cellular In Individual lobules there is capillary sized vessels with absence of mitosis or cytologic atypia - Microscopic features overlap with hemangioma
  37. 37. Early lesions – ecchymotic macules or patches Later lesions – bluish purple papules,nodules, plaques or tumors Regardless of type, it is Borderline malignancy with slowly progressive but may involve internal organs M/E : Early lesions – show dermal proliferation of irregular slit like vascular channels with extravasated erythrocytes, hemosiderin and plasma cells.
  38. 38. The vascular channels infiltrate between collagen bundles and surround existing blood vessels (promontary sign) and appendages Endothelial cells are plump or inconspicuous with no significant cytologic atypia Later stage – Increased spindle cells between poorly defined slit like vessels Tumor cells – Intracytoplasmic PAS positive hyaline globules
  39. 39. Skin of distal extremities Young adults Gross : Reddish purple, slowly growing plaque centered in reticular dermis, < 2-3 cm M/ E : Elongated, arborizing narrow vessels that resemble rete testis . Endothelial cells are monomorphic with low mitotic rate, hyperchromatic nuclei and hobnail morphology Sarcoma between vascular channels is prominent aand shows abundant lymphocytic infiltrate
  40. 40. seen in infants and children in skin Slow growing nodule or plaque M/E : Thin walled vascular spaces that contain intraluminal papillary tufts of endothelial cells within hobnail morphology are present
  41. 41. Mixture of benign, intermediate or malignant histologic patterns Long standing red-blue nodules or plaques on hands & feet in adults Poorly circumscribed, with infiltrative growth pattern Different componentsRetiform, Epithelioid, Spindle cell, Angiosarcoma, Lymphangioma, Arteriovenous malformation
  42. 42. Primary sites: Superficial and deep soft tissue, viscera (liver), bone Gross : poorly circumscribed, multilobular infiltrative mass upto 10 cm or as multiple masses. M/E : seen as Cords, short strands, solid nests or individual cells that have rounded to slightly spindled features The cells are low grade with a low mitotic rate Endothelial differentiation is evident by formation of intracytoplasmic lumina(signet ring like features)
  43. 43. Distinct vascular channels are not prominent Neoplastic cells are embedded into chondroid like hyalinized stroma  Atypical morphological features : Increased mitotic rate increased nuclear pleomorphism more spindled cytology, necrosis IHC : tumor cells express – CD13, CD34, Ulex Europaeus antigen, variably express Factor XIII related antigen
  44. 44. It is divided into several groups: Cutaneous angiosarcoma Angiosarcoma of breast Radiation induced angiosarcoma Angiosarcoma of deep soft tissue Gross : Poorly circumscribed hemorrhagic mass from 1-2 cm to > 10 cm M/E : Varies from hemangioma like features but with scattered, enlarged, atypical endothelial cells with occasional mitotic figures and infiltrating growth pattern to that of high grade spindle cell sarcoma
  45. 45. Gross : Hemorrhagic appearance of angiosarcoma of lip
  46. 46. Angiosarcoma of mediastinal mass : Anastomosing vascular channels
  47. 47. vascular Channels are seem to be ,lined by highly atypical endothelial cells
  48. 48. Variant Epithelioid Angiosarcoma seen in deep soft tissue Malignant epithelioid cells with abundant eosinophilic or amhophilic cytoplasm, large vesicular nuclei and prominent nucleoli
  49. 49. Epithelioid angiosarcoma arising form region of seminal vesicle
  50. 50. Ulex europaeus lectin 1 reactivity in angiosarcoma
  51. 51. LYMPHANGIOMA  Cavernous or cystic vascular lesions composed of dilated lymphatic channels  Seen in Head and neck region in young children  M/E : Thin walled dilated lymphatic vessels of varying sizes lined by flattened endothelium, beneath which are lymphoid aggregates  Can be Mediastinal or retroperitoneal  Lung tumor – multiple, stellate lesions with slips of smooth muscle around spaces filled with proteinaceous lymph fluid
  52. 52. Cavernous lymphangioma
  53. 53. Large cystic hygroma in an infant
  54. 54. Lymphangioma of soft tissue showing dilated spaces lined by flattened endothelium. A scattering of lymphocytes is present in stroma
  55. 55. Microscopic appearance of lymphangioma
  56. 56. Lymphangiosarcoma is a rare malignant tumor which occurs in long-standing cases of Primary or Secondary Lymphedema SITE- upper extremities Presents as a bluish or purplish skin discoloration or tender skin nodule. Often multiple. It progresses to an ulcer with crusting, and finally extensive necrosis. Postmastectomy Lymphangiosarcoma (Stewart-Treves Syndrome)
  57. 57. HistologyThere is an admixture of spindle cells and vascular spaces deformed by pleiomorphic endothelial cells. Lymphangiosarcoma cells express positive endothelial markers CD34, vimentin, keratine, VIII factor antigen It metastasises rapidly to the lungs, chest walls, liver and or bone and the reoccurrence rate is high
  58. 58. GLOMUS TUMOR Originates in the neuromyoarterial glomus Classically located in subungual region but may also be found in skin, soft tissue, nerves, stomach, nasal cavity and trachea Tend to be multiple and of infiltrative nature in children Presents as varicosities of lower extremities Superficial lesions are well circumscribed
  59. 59. M/E- consist of blood vessels lined by normal endothelial cells and surrounded by a solid proliferation of round or cuboidal “epithelioid” cells with round nuclei and acidophilic cytoplasm IHC- positive for myosin, vimentin, actin, and basal lamina components but not for desmin Microscopic types of glomus tumor:  solid  Angiomatous  Myxoid
  60. 60. Glomus tumor
  61. 61. Immunoreactivity for smooth muscle in glomus tumor
  62. 62. Sternberg’s Diagnostic Surgical Pathology – 5th edition Rosai and Ackerman’s Surgical Pathology – 10th edition Robbins and Cotron Pathologic Basis of Disease – 8th edition internet